Infracture Technique for the zygomatic body and arch reduction

In the Orient, prominent malar regions are considered unaesthetic and the majority of women with a prominent malar want to reduce the zygoma. Various operative procedures such as shaving or chiseling the zygomatic body or the zygomatic arch have been used for reducing malar eminence, but the zygomatic arch cannot be reduced sufficiently by these methods. By combining intraoral shaving of the zygomatic body and a new effect arch infracture technique through a temporopreauricular incision, we have obtained very satisfactory results in 19 cases and notable minimal complications over the last three years.     

应用钛合金人工关节凹半置换术治疗颞下颌关节强直的初步报告

作者采用钛合金人工关节凹治疗颞颌关节强直。该方法解决了其它方法所产生的因去骨过多而致下颌偏位、开合、以及填隔物固定不佳而致脱位等缺点,具有手术简单,对机体创伤小,有良好的固定装置,又可免除切取自体移植料而给病人造成痛苦的优点。通过对一例双侧颞颌关节骨性强直病人行钛合金人工关节凹置换治疗,经1.5年的观察随访,开口度为2.5cm,达到理想效果。     

凸性颗粒构成的粘连区域的三类自动分离方法的对比分析

数字图像中粘连目标区域的自动、准确分离是图像分析的难点和热点,直接影响着各类图像自动分析系统的整体性能.本文对凹点分析、椭圆拟合和流域变换三类粘连目标分离方法的主要步骤、优缺点和适用性进行了比较分析.分析结果表明:凹点分析法适用于分离轮廓凹陷明显的少数凸性颗粒构成的简单区域;椭圆拟合法往往适用于有粘连的特定颗粒的自动计...     

终板凹陷角变化对腰椎运动节段生物力学影响的有限元分析

目的:研究终板凹陷程度变化对腰椎运动节段生物力学影响。方法:在以往建立的腰椎L4～5运动节段三维非线性有限元模型基础上,采用CAD方法精确构建三种不同终板凹陷角改变的有限元模型,有限元模型的椎间盘前凸角、小关节间隙等其余形态学参数及网格划分均保持一致。垂直压缩、屈曲、伸直、前后剪力5种载荷条件下,分别对三种有限元模型生物力学参数进行测试。结果:负载条件下,终板凹陷角增加、终板凹陷程度减小可导致终板-椎间盘界面应变减小,椎间盘刚度及髓核内压增加,椎间盘膨出、纤维环纤维张应力、纤维环基质应力、腰椎后部结构应力以及关节突接触力减小。结论:终板凹陷程度的减小增强了椎间盘对椎体的保护作用;同时可通过影响终板的形变减少对椎间盘的营养传递。     

Functional heterogeneity of single neuronal activity in the monkey dorsolateral prefrontal cortex

Extracellular single unit recording during high fixed ratio bar press behavior, guided by multimodal cue stimuli for food intake, revealed functional heterogeneity in the monkey dorsolateral prefrontal cortex. Cells were found significantly more often in the ventral arcuate concavity, the dorsal arcuate concavity, the principal sulcal area and the inferior convexity which responded, respectively, to visual events, auditory events, visual plus auditory events and bar press.     

国人颈椎终板矢状面形态学研究

目的 :测量国人颈椎间盘终板矢状面形态,并分析其与年龄、性别、节段之间差异的变化情况,为基于国人颈椎解剖结构设计的椎间融合器、人工椎间盘和人工髓核假体提供理论参考。方法:从深圳市第二人民医院门诊随机筛选颈椎MRI数据404例,其中男性191例,女性213例,年龄15~72岁,平均38.4±8.8岁,通过MRI测量颈椎间盘终板凹陷深度(endplate concavity depth,ECD)和位置(endplate concavity apex,ECA),分析终板矢状面形状。将样本按照年龄分为5组:15~27岁(40例)、28~37岁(143例)、38~47岁(164例)、48~57岁(48例)、58~72岁(9例);按照性别分为男性、女性组;按照不同节段分为:C3/4、C4/5、C5/6、C6/7组,研究矢状面形状、ECD、ECA在年龄、性别、节段之间的统计学变化。结果:各年龄段之间颈椎间盘终板矢状面形状差异无统计学意义(P0.05);404例国人ECD为1.70±0.42mm,各年龄段之间ECD差异无统计学意义(P0.05);ECA差异无统计学意义(P0.05)。男性组和女性组颈椎间盘终板矢状面形状差异无统计学意义(P0.05);男性和女性ECD差异有统计学意义(P0.05),分别为1.79±0.44mm、1.62±0.38mm;ECA差异无统计学意义(P0.05)。上、下终板之间颈椎间盘终板矢状面形状差异有统计学意义,下终板呈平坦型,而上终板大多呈凹陷型;各节段之间ECD差异有统计学意义(P0.05),ECA差异无统计学意义(P0.05)。结论:国人颈椎间盘终板矢状面形状、ECD和ECA在各年龄段之间均无差异。颈椎间盘终板矢状面形状、ECA在性别之间无差异,但ECD有差异,男性比女性大。ECD在各节段之间有差异,但ECA无差异。     

An expert electrocardiogram quality evaluation algorithm based on signal mobility factors

Abstract

The major concentration of this study is to describe and to develop a new electrocardiogram (ECG) signal measurement binary quality assessment (accept–reject) technique. The proposed algorithm is composed of three major stages: pre-processing, signal mobility-based quality measurement and advanced post-evaluation. The pre-processing step includes baseline wander and high-frequency disturbances removal. The signal mobility-based quality measurement routine includes two separate stages based on energy and concavity of the ECG signal. The post-evaluation quality measurement step is mainly based on the six features inferenced from heuristic experiences and human thinking models. The proposed technique was applied to the test dataset provided by the PhysioNet Computing in Cardiology (CinC) challenge 2011 and accuracy 93.40% was achieved which shows the marginal improvement in this field.     

双侧Medpor置入矫正鼻旁区凹陷畸形

目的：探讨应用高密度多孔聚乙烯（Medpor）置入矫正鼻旁区凹陷畸形方法。方法：对17例先天鼻旁区凹陷患者以Medpor作为置入材料,在凹陷区下方骨质表面贴附充填。结果：17例患者鼻旁区凹陷得以矫正,外形效果满意,无感染、假体外露等并发症。结论：Medpor置入矫正鼻旁区凹陷畸形,是一种安全有效的方法。